Improvement in bolt-clipping machines



0. CHAMBERS, J12, '& W. 'MBNDHAM. Bo1t-G1ipping Machine.

No. 207,252. Patented Aug. 20,1878.

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- wfiwssw; fluvial/am I w 7 W UNITED STATES PATENT ()FFIGE.

CYRUS CHAMBERS, JR., AND WILLIAM MENDHAM, OF PHILADELPHIA, PENNSYLVANIA;SAID MENDHAM ASSIGNOR TO SAID CHAMBERS.

IMPROVEMENT IN BOLT-CLIPPING MACHINES.

Specification forming part of Letters Patent No. 207,252. dated August20, 1878; application filed March 13, 1876.

To all whom it may concern: 1

Be it known that we, CYRUS CHAMBERS, Jr., and'WiLLmM MENDHAM, ofPhiladelphia, in the State of Pennsylvaniznhave invented certain new anduseful Improvements in Bolt-Clipping Machines; and we do hereby declarethe following to be a fulla-nd correct description ofthe same, referencebeing had to the accompanying drawings, in which Figure 1 is a sideelevation of the machine, the head being partly broken away to show theinterior parts. Fig. 2'is a longitudinal section on line a a of Fig.1...Fig. 3 is a transverse section on line 00 w of Fig. 1. Fig. 4 is asection on liney y of Fig. 1. Fig. 5 shows the stationary cutter O inface and edge view. Fig. 6 is a side elevation of the movable cutter K.

The same part is indicated by the same letter of reference wherever itoccurs.

Our invention consists in improvements in -the details of constructionof the bolt-cutter originally patented by J. Johnson, June 4, 1867, andby \Villiam Mendham, April 4, 1870, said improvements having for theirobject to make the instrument more durable, adj ustable, and accuratethan it was in its original form.

The general construction of the original ma chine is not essentiallychanged.

The instrument consists of a head, A, provided with a stationary cutter,O, and a movable cutter, K, the latter sliding in suitable ways V V, andoperated by a rack, R, driven by toothed segments T attached to andforming part of the levers M M, by which the instrument is held andworked.

Referring to the patents before mentioned, our first improvementconsists in the manner of securing the stationary cutter to the head.Near the end of the instrument a wide recess is made across the head forthe reception of the wide flange f, which forms the back of the cutterO. This recess unites with the V shaped guidewaysVV, in which themovable cutter K traverses. The flange of cutter G is beveled at itsfront corners, as at p p, to correspond with the under side of bevel ofthe guideways V V, and when the flange is driven home against the frontsurfaces of the ways V V the edge of the stationary cutter is ex actlyin its proper position relatively to the edge of the movable cutter. Thescrew B, passing through the top of the head into cutter 0, prevents itfrom slipping back.

Our second improvement relates to the mode of securing the movablecutter K in position andmaintaining the coincidence of the two cutters.is attached, by a screw, D, passing through slots, to the tongue G ofrack R, which forms its stock. The edges of the cutter are beveled to aV shape, to correspond with the shape of the ways in which they move.Each cutter K is made of such a thickness and shape, as shown, that whenits beveled edges are in the guideways V its cutting-edge shall be inthe same plane with that of cutter O, and flush, or nearly so, with theface of the head of the instrument. The longitudinal adjustment ofcutter K is made by means of the screw L, as heretofore.

Our third improvement consists in giving such a shape to the tongue G ofrack It, to which the cutter K is attached, that it shall not out offthe lower V-guide of the cutter. This we effect by narrowing theprojecting face of the tongue Gr, to which face the cutter is affixed,in the manner clearly shown in Fig. 3.

Our fourth improvement consists in making the upper or outer end oftongue G a little thicker than the other end, so that if the screw D,which confines the cutter to the tongue, should become a little slack orloose, the cutter would not slide toward the outer or thicker end of thetongue on account of the binding between the surfaces which would resultfrom the inclination of one of them.

Our fifth improvement consists in making the edge of the stationarycutter wider than the largest bolt the instrument is adapted to cut, forthe purpose of preventing the breaking of the corners of thecutting-edge, which would be likely to occur if the cutter were of theexact width of the bolt to be severed. This construction is clearlyshownin Fig. 1. The width of the slot in which cutter K moves limits thediameter of the bolt which the in strument is intended to cut.

Our sixth improvement consists in making The cutter K is formed ofsteel, and

the screw-pivots E, on which the levers M turn, so that the entirethickness of the screwblank passes through the eyes 0 of the levers Mand enters the opposite jaw of the casting A, in which the segments Tmove, said opposite jaw being counterbored or recessed, as at 0, abouthalf -way through, and tapped or threaded the remainder of its thicknessto receive the threaded ends of the pivots E, as clearly shown in Fig.at at 2'. By this construction the full strength of the screw bolt orpivot E is left to bear the powerful shearing strain to which it issubjected when the machine is in use.

Having thus fully described our improvements, what we claim, and desireto secure by Letters Patent, is-

1'. In combination with the stationary cutter 0, having a wide flange,f, beveled at p p, as described, the recess in the head A, having acorresponding beveled form and connecting with the V-shaped guideways ofthe movable cutter, in the manner and for the purpose set forth.

2. The movable cutter K, formed of steel and having a double bevel oneach side, as shown, in combination with the V- shaped guideways in thehead A, having the form and location indicated, the whole so arrangedthat when the beveled edges of the movable cutter are in their guidewaysits cutting-edge shall be in the same plane as that of the stationarycutter and flush with the face of the implement, all as specified.

3. The tongue G of rack B, having the narrow projecting face, as stated,in combination with the movable cutter K, having a double bevel on eachedge, and the guides V V, all constructed in the manner and for thepurpose pointed out.

4. The combination of the tongue G, having its upper end made thickerthan the lower end, with the cutter K and set-screw D, in the mannershown, and for the purpose stated.

5. The stationary cutter 0, having its cuttin g-ed ge made wider thanthe diameter of the largest bolt the instrument is capable of cuttin g,in combination with a movable cutter, K, working in a slot narrower thanthe blade of the stationary cutter, and limiting the diameter of thebolts to be cut, all as described, and for the purpose referred to.

6. The screw-pivots E, constructed as described, in combination with thecounterbored and tapped jaws of the head A and the toothed segments T,all as and for the purpose indicated.

The above specification of our said invention signed and witnessed atPhiladelphia this 10th day of March, A. D. 1876.

CYRUS CHAMBERS, JR. \VILLIAM MENDHAM.

ituesses:

BERNARD CHAMBERS, J. HOWARD CHAMBERS.

